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dianella caerulea height

Wondering how tall Dianella caerulea, also known as the Paroo Lily, can grow in your New Zealand garden? Understanding Dianella caerulea height is essential for designing beautiful, low-maintenance landscapes using this robust native. Whether for mass planting, understorey coverage, or feature planting, the size and structure of Dianella caerulea have a big impact on your plant combinations and overall garden design.

Dianella caerulea (Paroo Lily)

Paroo Lily, Flax Lily

Dianella caerulea, commonly known as the NZ Flax Lily or Paroo Lily, is an herbaceous perennial that bears spikes carrying delicate blue and yellow flowers in spring, which are followed by small, blue berries in summer. These are held neatly above the dark green, strap-like leaves. It typically grows to 1 m tall and the same width. Dianella caerulea is suited to adding to mixed plantings, mass planting under trees and shrubs, or on a bank, including in cottage gardens, or maintaining in a container.

Dianella caerulea plants with blue flowers.
  • Suited to regions:
    All regions
  • Plant type:
    Flaxes
  • Height:
    1.00 m
  • Spread:
    1.00 m
  • Flowering time:
    Spring
  • Tolerances:
    Coastal, Extended dry periods, Hardy, Wind
  • Garden uses:
    Borders, Containers, Living areas, Paths & Steps, Ponds, Pool areas
  • Garden styles:
    Backyard, City & Courtyard, Coastal, Frontyard, Japanese, Mediterranean, Modern
Dianella revoluta 'Little Rev' plants in a garden.
Most Popular Dianella 'Little Rev'

Dianella 'Little Rev' (Blue Flax Lily) is a compact and hardy ornamental grass like plant valued for its attractive blue green foliage and tidy...

From$15.87
dianella-caerulea-goddess-
Most Popular Dianella Goddess

Dianella Goddess is a variety of the commonly known, NZ Flax Lily, and produces upright, strap-like leaves which are a rich, dark green with a blue...

From$20.63
dianella-revoluta-kentlyn--2
Most Popular Dianella Kentlyn

Dianella Kentlyn is a variety of the commonly known, Flax Lily, produces upright, strap-like leaves which are a rich, dark green with a blue...

From$16.49
Dianella caerulea 'Breeze' growing in a roadside garden.
Most Popular Dianella 'Breeze'

Dianella 'Breeze' (Turutu) is a hardy and attractive perennial that brings lush, strappy green foliage and clusters of delicate blue flowers to New...

From$16.49
Dianella 'Margaret Pringle' plant in a pot.
Most Popular Dianella 'Margaret Pringle'

Dianella 'Margaret Pringle' bears spikes carrying delicate, blue flowers in spring, which are followed by small, blue berries in summer. These are...

From$20.63
Large Astelia chathamica in a garden with silver flax-like leaves.
Most Popular Astelia chathamica (Chatham Island Astelia)

Astelia chathamica, commonly known as the Chatham Island Astelia or Kakaha, produces broad, erect, silver-green leaves. The leaves are held with a...

From$159.95
Libertia grandiflora plant with elegant white flowers and lush, dark green foliage.
Most Popular Libertia grandiflora (NZ Iris)

Libertia grandiflora, commonly known as NZ Iris, is a hardy New Zealand native perennial admired for its elegant white flowers and sword like green...

From$16.50
A large Phormium 'Jester' plant with colourful foliage.
Most Popular Phormium 'Jester'

Phormium 'Jester' is a showy variety of Flax that produces leaves that are striped with a broad, pink central band and a dark purple border. This...

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Phormium 'Surfer Bronze' plants for sale at The Plant Company nursery.
Most Popular Phormium 'Surfer Bronze'

Phormium 'Surfer Bronze' is a compact and stylish New Zealand native flax with narrow, upright leaves in rich bronze tones. This striking ornamental...

From$12.95
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Most Popular Phormium 'Stripy Mist'

Phormium 'Stripy Mist' is an attractive New Zealand flax valued for its beautifully variegated foliage featuring soft green leaves striped with...

From$17.95
Dianella caerulea (Paroo Lily)

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How tall does Dianella caerulea grow?

The typical Dianella caerulea height ranges from 60 cm to 1 metre under ideal conditions, though some mature specimens may reach up to 1.5 metres in height, especially when planted in optimal soils with adequate moisture. Its upright, strappy foliage forms dense clumps, making it perfect for borders, pathways, and low-maintenance gardens. Flowering stems can rise above the foliage, adding another 30 to 50 cm, decorated in late spring with delicate blue-mauve flowers, followed by striking blue berries.

How Dianella caerulea height fits your landscape

Thanks to its tidy clumping habit and moderate size, Dianella caerulea is incredibly versatile. Its height provides a subtle vertical presence among groundcovers, and it's low enough not to obstruct views in mixed plantings. Whether you're creating a native planting alongside Libertia cranwelliae (Cranwell's Iris), or seeking companions with striking contrasting colour, Daiella caerulea is a reliable choice. For massed effect, plant in groups 40–60 cm apart and enjoy year-round greenery.

Comparing Dianella caerulea height with popular cultivars

If you love the look of the Paroo Lily but want varied heights or a tighter form for smaller spaces, several Dianella cultivars have been bred for compactness or specific colour traits. For example:

These selections allow you to layer different textures and heights, or replace the classic species with better performing or more colourful options.

Combining with other structural plants

Dianella caerulea’s height lends itself to pairing with other bold architectural plants. In New Zealand gardens, it's often combined with striking flaxes such as Phormium 'Rainbow Surprise', Phormium 'Joker', Phormium 'Pink Panther', or Phormium 'Shiraz' for year-round drama and colour contrast.

Summary

In summary, Dianella caerulea height makes it an outstanding choice for borders, garden beds, native plantings, and low-maintenance landscaping across New Zealand. Its moderate size provides structure without overpowering companion plants, while cultivated varieties like Dianella 'Little Jess' and Dianella 'Little Rev' offer even more creative options. Visit our product pages to explore Dianella and other architectural foliage plants perfectly suited to your garden design.


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Canna Cannova Rose and Magnolia stellata 'Waterlily' are tried and true, but new favourites like Cercis canadensis 'Forest Pansy', Rosmarinus 'Mozart', and Camellia Roma Red are just waiting to be discovered.
–The Plant Company

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